Filament winding apparatus



' March 20, 1945. s 2,371,782

- I FILAMENT WINDING APPARATUS Filed Sept, 15, 1943 4 Sh'eet-Sheet 1 IN VEN TOR.

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K TTOEA E'r March 20,1945. E SlRP 2,371,782

FILAMENT WINDING APPARATUS Filed Sept. 15, 1943 4 Sheets-Sheet 2 INVENTOR. Q E S/eP ATTORNEY March 20, 194 5.

E. SIRP EILAMENT WINDING APPARATUS Filed Sept. 15, 1943 4 Sheets-Sheet 3 Q INVENTOR. t. Snap HTTOENE Y March 20, 1945. s P

FILAMENT WINDING APPARATUS 4 Sheets-Sheet 4 Filed Sept. 15, 1943 INVENTOR;

.5 S/RP' 4947 Z 4-7 Wm c QM mu\ mM I k A TTOENEY ing filaments.

Patented Mar. 20, 1945 ern Electric Company, Incorporated, New York; N. Y., a corporation of New York Application September 15, 1943, Serial No. 502,493

Claims.

This invention relates to filament winding apparatus and more particularly to an apparatus for winding a filament comprising adoublewound helix, all spirals of which extend in the same direction.

' It is an object of the present invention to prowind-' vide a simple apparatus for expeditiously In accordance with one embodiment of the invention, a. supply spool and associated filament guiding means are 'pivotally mounted on the end of a reciprocable rod adapted to be reciprocated by a cam drum and to support the supply and filament guiding mechanism adjacent a mandrel rotated in "time relation to the reciprocation of the supply and guiding mechanisms, whereby a filament may be wound to form a. spiral orhelix on the mandrel extending in one direction and when the free end of the mandrel is adjacent the filament guiding means, the guiding means may be moved around the end of the mandrel.

to place the wire in a slot formed in the end of the mandrel whereby rotation of the mandrel in the opposite direction and movement of the supplyin the opposite direction will interlay a helix or spiral spiralled in the same direction as that previously applied on the mandrel.

A complete understanding of the invention may be had by reference to the following de--' tailed description when considered in conjunc tion with the accompanying drawings, wherein Fig. 1 is a front elevational view of an apparatus embodying the features ofthe invention, part of the apparatus being broken away to show the details of a chuck for holding the mandrel; Fig. 2 is. a plan view of the apparatus shown in Fi 1;

Fig. 3 is a detail view in perspective on a large scale of a mandrel suitable for use in an aDParatus, part of the mandrel being broken away to conserve space;

,Fig. 4 is a transverse vertical sectional view of the filament guiding and supp y mec Fig. 8 is an enlarged detail'vlew showing the filament applied to the mandrel at the begi ning of the winding of the first helix;

Fig. 9 is a side elevational view of the mandrel shown in Fig. 8 and showing the first helix completely wound on a mandrel and illustrating diagrammatically the means;

path of the filament guiding Fig. 10 is a view similar to Fig. showing filament completely wound on the mandrel and tied thereon;

Fig. 11 is an' enlarged fragmentary detail vie of a means provided for holding the filament against the mandrel while the filament guiding means is pivoted around the end of the mandrel; and

Fig. 12 is a sectional view taken substantially along the line lZ-IZ of Fig. 10 in the direction of the arrows.

The apparatus illustrated in the drawings is designed to wind the filament in a manner illustrated graphically in Figs. 8, 9-and l0 and comprisesa main U-shaped frame member ll, which'may be positioned on a suitable bench or table I6 and which supports all of the operating parts of the apparatus. Journalled in the upwardly extending arms'of the main frame member I5 is a shaft I1, which extends outwardly through a disc I mounted on the left face of the left leg (Fig. 2) of the member l8. At its left end, the shaft II has a hand wheel l8, suit-' ably keyed to it and the hand wheel I! in turn has a plunger manipulating'handle 20 mounted upon it. The handle 20 is provided with an irregularly shaped shank 2I, as shown. most clearly in Fig. l, the right end of which is adapted to enter any one of three apertures 22, 23 or 24 formed in the disc 18. The shank 2| of the handle 20 has a shoulder 25 formed on it against which the right end (Fig. 1) of a compression spring 26 bears; The left end of the compression spring 26 is seated against an annular collar 21 suitably attached in a projection 28 on the hand wheel IS. The spring 26 hearing against the collari'l will thus ur e the shank 2| of the handle 20 to enter the apertures 22. 23 or 24 when it moves into alignment, with them. The shaft IT has a cam drum 2! fixed to it, on the left face of which (Figs. 1 and 2) there is mounted a gear 30, which, in turn, meshes with gear teeth.

8| cut into a chuck supporting shaft 32 suitably journalled in the upright legs of the main frame member ll.

The chuck supporting shaft has a spring t ne chuck 33 of any "suitable construction mounted on its right end (Figs. 1 and 2). The chuck includes a slidable collar 34, which may be advanced to the right or retracted to the left (Figs.

1 and 2) to actuate chuck jaws35-35 for gripping a mandrel 36 between them. The collar 34 is adapted to receive a forked member 31 mounted upon a slidable rod 38, which is adapted to be slidably supported in the main frame member I5. The rod 38 may be actuated by a handle 39, which is pivotally connected thereto by means of a pivot pin 48 and which is oscillatable about a pin 4 I on the end of a fixed rod 42. The rod 42 is fixed to the right hand upright of the U-shaped member I5 by means of a pin or set screw 43. I

From the foregoing, it is believed to be apparent that when the hand wheel I9 is rotated, rotation will be imparted to the shaft 32 through the action of the gear 38 and teeth 3I simultaneously with the rotation of the cam drum 29. The cam drum 29 is provided with a cam groove 44, the shape of which is most clearly illustrated in the developed view of the cam shown in Fig. 6. Extending into the cam groove 44 is a cam pin 45, which is mounted upon a sloping surface of a block 48 suitably fixed to a slide 41 slidably' mounted in both legs of the main frame member I5. The main frame member I5 is provided with a transversely extending flange 88, on the upper surface of which there is pivoted a manually. operable lever 8I having a handle 82 (Figs. 1

' and 4) The lever 8| extends through a slot 83 in the block 48 and is normally urged against the left edge of the slot (Fig. 1) by a compression spring 84 seated in a socket 85 formed in the block- 48 and bearing against the right edge of the lever 8I.

Mounted upon the right end (Figs. 1, 2 and 5)- of the slide 41 is a supply and guide supporting block 88, on which there is pivoted a bracket 81. The bracket 81 includes a fiat disc-like member 88, having extending upwardly therefrom a ver-' tical portion 89, which is formed integrally with a horizontally extending portion III. The horizontally extending portion I8 extends over the be'urged by a spring 18, one end of which bears against the stop pin 14 and the other end of whichbears against a plug 11 fixed in the aperture I8.

- In this manner, the bracket 81 may be locked either-in the position shown in-full lines (Fig. 5) or in the position shown in dotted lines in this figure.

Pivotally secured to the underside of the disclike member 88 is a support bracket 85, which, as shown most clearly in-Figs. 1 and '1, has a reel supporting shaft 88 attached to it. The shaft 88 is threaded at its right end (Fig. 1) to receive a reel retaining member 81 and this end of the shaft terminates in a shoulder portion 88 adapted to bear against a guide supporting plate 89. interposed 'between the shoulder 88 and the righthand faced the bracket 85. The left end of the shaft 88 is also provided toreceive a lock nut assembly 98, which may be utilizedfb attach the shaft to the bracket 85 and alsd't'o adjust" the frictional engagement of the guide supporting" plate 89 with the face of the bracket 85. A

handle 9i is fixed in the threaded left end of the shaft 88 to facilitate manipulation of the reel retaining member 81 andthe lock nut assembly 98. The rotated position of the guide supporting plate 89 with respect to the bracket 85 may be adiusted by oscillating the plate 89 with respect to the bracket and the plate may then be fixed in any selected position by means of a wing nut as-- sembly 92, which is adjustable along a slot 93 formed in the bracket 85. Fixed to the guide surpporting plate 89 is a guide block 94 (Figs. 5 and 7) which carries a guide nozzle 95 at its upper end and the relative position of which with respect to the mandrel 38 may be accurately regulated by means of a set screw 98, which is threaded in the block 94 and has its end engaging the vertical portion 89 of the bracket 81, In addition to supporting the guide nozzle 98, the guide block 94 has a brakingbell crank lever 91 pivoted on it and normally urged by a spring-pressed plunger 98 to force a strand of filament wire 99 against the upper surface of the block 94. The plunger 98 is urged against the vertically extending leg of the bell crank lever 91 by a spring I88 held in an aperture IN by a thumb nut I82. The

guide block 94 also supports a guide sheave or roller I83, which serves to guide the filament wire 99 from a reel I84 mounted on the shaft 88 in its passage to the guide nozzle 95.

In addition to serving as a pivot for the bracket 81 on the guide supporting block 88, the tube II serves as a positioning element to position a holding member I85 directly below the end of the mandrel 38 when the guide supporting block 88 is in its extreme right hand position, as seen in Figs. 1 and 2. The holding member I88 is loosely mounted inthe tube II and is provided with ahandle' I88, whereby it may be manually semi-circular portion of the mandrel, a straight round portion III is provided which terminates in a shoulder H2. The shoulder H2 is provided with two sets of grooves H8 and H4 on opposite sides of it, into which the filament wire 99 may be set in the-fixing of the filament wire on the mandrel at the beginning and end of a winding operation. At the start of theoperation of the apparatus, slide 41 will be in its lefthand position opposite to that shown in Figs. 1 and 2 and the guide supporting plate 89 may be in the po sition opposite to that shown in ,Fig. '7. that is,

it may be moved to a. position where the nozzle 98 is carried away from the mandrel. The

D rture 22. The

\ operator may then lace the filament wire 99 through the grooves H8 and1II4, as shown in Fig. 8, and may then, after withdrawing the shank 2| of the handle 28 from the aperture 22, oscillate the hand wheel I9 to the position where the shank II will enter the aperture 28 (Fig. 4)

' to apply the group of windings II8 after moving the nozzle up to the position shown in Fig. 7.

Thehandwheel ll,inbelngmovedtrcmtheposition where the shank 2i registers with the'aperturellto the position where the shank 2i registers with the aperture 22, will bring the cam pin ll into alignment with cross passage ll! of cam groove 44 and the handle .2 may then be moved to cause the cam pin vII to move from left to groove 44 toapply the group or windings desig-'- nated I22 on the reduced portion 23 of the mandrel by rotating the hand wheel from the position where the shank 2] registered with the apertures 23 around to the position where the shank 2! falls into aperture 24 to block further movement of the hand wheel I! in that direction, that is, counter-clockwise, as seen in Fig. 4. In movingto the right, the slide 41 and the guiding mechanisms supported thereby will follow the lines indicated by'the arrows in Fig. 9 until the nozzle 95 is in the position shown in full lines in that figure. At this time, the entire guiding mechanism and supply mechanism supported by the bracket 61 may be shifted by rotating the bracket 67 around the tube II from the position shown in full lines in Fig. 7 to the position shown in dot and dash lines therein, thus to lay a portion I24 of the filament wire in a groove I25 formed in the right end'of the mandrel (Fig. 8), In order to prevent the filament wire from slipping off the end of the mandrel while it is being bent into the groove I25, the holding member I08 may be moved up to the position shown in Fig. 11 to bear against the last lay of filament wire applied on the mandrel until the nozzle 95 is in the position shown in dot and dash lines in Fig. 9. The direction of rotation of the hand wheel I! may now be reversed to move the shank 2! of the handle 20 from association with the aperture 24 back to association with aperture 23, thus including said guiding means operative upon reverse rotation oi said cam and mandrel to lay the second helix or the double helix coil on a mandrel in spaced relation to said one helix. 7 2. An apparatus for winding a double helix coil comprising a rotatable mandrel, means for ,rotating said mandrel, means for guiding a wire to said mandrel, means for producing relative movement between said mandrel and guiding means to form a helix with spaced convolutions,

ment between-the guiding means and mandrel means for shifting said guiding means when one helix is formed to a diametrically opposite position with respect to the mandrel, and means including the means for producing relative moveto form a second helix with its convolutions be-. tween the convolutions of the first helix upon rotation of the mandrel in a reverse direction.

3. An apparatus for winding a double helix coil comprisinga reversibly rotatable mandrel,

means for guiding a wire to said mandrel, means for moving said guide relative to said mandrel including a cam and a driving connection between said cam and mandrel oi such ration that 25 substantially one revolution of the cam will proand means for supporting the guiding means in position to guide the wire for formingthe' second helix of the double'helix coil upon reversal of rotation of said mandrel. V 4. An apparatus for winding a double helix coil 85 comprising a reversibly rotatable mandrel, movable means tor guiding a wire to said mandrel. means for positioning the guiding means to form one helix of a double helix coil," means for posil tioning the guiding means to rorm the second 4 helixof the double helix coil, and means ior contu apply a helical winding of wire between the group of windings I22. This will carry the cam drum 2! back to the position where the cam pin again is in alignment with the cross passage ill or the cam groove and lever 6| may now be manipulated to lay the filament wire III in a notch informed along the portion i2l of the mandrel. The handle 20 on the wheel 19 may then be moved to carry the shank 2| of the handle 20 back into alignment with the aperture 22,

intowhich the shank 2i will enter after superwindings Ill. The nozzle 05 may then be moved away from the mandrel by oscillating the guide supp rtin Plate I! after loosening the thumb nut 12 and the filament wire may be snubbed onto the round portion iii of the mandrel, as shown in Fig. 10, and the wire may be cut preparatory to removing the mandrel 28 from the chuck jaws I5 and inserting a new mandrel in paratus.

whatisclaimedis: a 1. An apparatus for winding a'double helix coil comprising a rotatable mandrel, means for groove 01' a singlespiral convolution for produc. ing relative movement between said mandrel and guiding means, means for rotating said mandrel in one directionin relation to said cam in produce one hell: of a double helix coil, and means ll tions in the opposite m 8 fila t supply the apthe end of the mandrel in the plane of guiding a wire to said mandrel, a cam'having a of the mandrel.

trolling the movement of said guide means including a cam having a circular groove, an interconnecting longitudinal groove, and an interconnecting helical groove. r

5.-The filament winding apparatus comprising a rotatable mandrel, means operable to rotate said mandrel a predetermined number of revollutions in one direction and the same number oi revolutions in the opposite direction, a filament guiding means positioned adjacent to one side of said mandrel for guiding filament radially to the mandrel during the rotation of the mandrel in one direction to form one helix of a double. helix coil, and 'means for shifting the guiding means around the end of the mandrel to the opposite side thereof to guide the filament during rotation of the mandrel in the opposite direction to form the second helix of the double helix coil.

.6. A filament winding apparatus comprising a rotatable mandreL'means operable to rotate said mandrel a predetermined number of revolutions in onedirection and the same number of revolutions in the opposite direction, a filament guiding ,means positioned adjacent to said mandrel for guiding filament radially to the mandrel, and pivot means adjacent to said mandrel for sup porting the guiding means for movement around the axis 7. A filament winding apparatus comprising a rotatable mandrel, means operable to rotate said mandrel a predetermined number of revolutions in one direction and the same number or revolumounted on said bracket including a feeding nozzle for directing the filament to a predetermined position, a mandrel rotatable on an axis at right angles to the nozzle, means for pivotally supporttation of the mandrel and at right angles to the nozzle, reciprocatory meansfor imparting rotation to said supporting means, and means for driving the mandrel and the reciprocatory means in timed relation. I

, 9. In an apparatus for winding a heater filament having a double helix, all spirals of which extend in the same direction, a reel for supporting a supply of filament to be wound, a bracket for supporting said reel, guide means pivotally mounted on said bracket including a feeding nozzle for directing the filament to a predetermined position, a mandrel rotatable on an axis at right angles to the nozzle, means for pivotally supporting said bracket at right angles to the axis of rotation of the mandrel and at right angles to the nozzle, reciprocatory means for imparting rotation to said supporting means, and means for driving the mandrel and the reclprocatory-means in timed relation, said means for pivotally supporting the bracket being positioned to carry the guiding means around the end ofthe mandrel.

10. In an apparatus for winding a heater filament having a double helix, all spirals of which extend in the same direction, a, reel for suppo'rting a supply of filament to be wound, a bracket for supporting said reel, guide means pivotally mounted on said bracket including a feeding nozzle for directing the filament to a predetermined position, 'a mandrel rotatable on an axis at right angles to the nozzle, means for pivotally supporting said bracket at right angles to the axis ofrotatlon of the mandrel and at right angles to the nozzle, reciprocatory means. for imparting rota-- tion to said supporting means, means for driving the mandrel and the reciprocatory means in timed relation, and means for maintaining the strand under tension between the means for supporting a supply of filament on the mandrel.

11. In an apparatus for windingafilament comprising a double wound helix, all spirals of which extend in the same direction, a mandrel, means for imparting rotation to said mandrel, guiding means positionable adjacent said mandrel to guide a filament to the mandrel, means for supporting a supply of filament adjacent to the guiding means. a common support for the supply and guiding means, a block for carrying said support, and means pivotally connecting the support to the block to position the guiding means on either side of the mandrel.

12. In an apparatus for winding a filament comprising adouble wound helix, allspirals of which extend in the same direction, a mandrel, means for imparting rotation to said mandrel, guiding means positionable adjacent said mandrel to guide a filament to the mandrel, means ing said bracket at right angles to the axis of-rofor supporting a supply of filamentadiacent to the guiding means, a common support for the supply andgui ding means, a block for carrying said support, means pivotally connecting the support to the block to position th guiding means on either side of the mandrel, a slide for carrying said block; and means for imparting reciprocation to said slide in timed relation 'to the rotation of the mandrel.

13..l'n an apparatus for winding 9. filament comprising a double wound'helix, all spirals of which extend in the same direction, a mandrel, means for imparting rotation to said mandrel,

guiding'means positionable adjacent said mandrel to guide a filament to the mandrel, means for supporting a supply of filament adjacent tothe guiding means, a common, support for the supply and guiding means, a block for carrying said support, means pivotally connecting the sup- V predetermined direction and being operable to ,ing said cam drum.

rotate the-"mandrel in the opposite direction when the slide moves in the opposite direction.

14. In an apparatus for winding a filament comprising a double wound helix, all spirals of which extend in the same directioma mandrel, means for imparting rotation to said mandrel, guiding means positionable'- adjacent said mandrel to guide a filament to the mandrel, means for supporting a supply of filament adjacent to the guiding means, a'common support for the supply and guiding means, a block for carrying said sup port, means'pivotally connecting the support to the block to position the guiding means on either side of r the mandrel, a slide for carrying said block, means for imparting reciprocation to said slide in timed relation to the rotation of the mandrel, and means for imparting reciprocation to the slide comprising a cam drum rotatable in timed relation to the rotation of the'mandrel, and a, camming pin attached to the slide and engag- 15. In an apparatus for winding a filament comprising a double wound helix, all spirals of which extend in the same direction, a mandrel, means for imparting rotation to said mandrel,

' guiding means positionable adjacent said mandrel to guide a filament to the mandrel, means for supporting a supply of filament adjacent to the guiding means, a common support forthe suping said cam drum, the cam drum having a. plurality of interconnected grooves therein for receiving the cam pin whereby at predetermined times the slide may be moved without rotating the mandrel.

' ElVHL SIRP. 

